Inoki Genome Federation officials Tuesday announced the bout, which
takes place at Tokyo Dome City Hall in Tokyo. A professional
wrestling organization founded in 2007 by Japanese grappling icon
Antonio Inoki, IGF occasionally holds MMA bouts in addition to its
pro-wrestling matches.

Ishii, 26, made his MMA debut in 2009 after winning a gold medal in
judo at the 2008 Olympics. The Japanese grappler has won his last
three fights, all of which were held under the IGF banner.
Following a knockout loss to Fedor
Emelianenko to close out 2011, Ishii outpointed former UFC
champion Tim
Sylvia this past December and followed that triumph with
submissions of Sean
McCorkle and Kerry Schall to
kick off 2013.

Rizzo, 38, returned to competition in June following two years on
the shelf, when he saw a three-fight winning streak snapped by
Emelianenko in the M-1 Global ring. Now in the twilight of his
career, Rizzo previously contended for the UFC heavyweight title on
three occasions, coming up short against Kevin
Randleman and Randy Couture
(twice). More recently, “The Rock” bested fellow veterans Jeff Monson,
Gary
Goodridge and Ken Shamrock
before falling to Emelianenko last year.